chore(deps): bump zsh-abbr from 4facba3 to 899f477 (#1018)

Bumps [custom/plugins/zsh-abbr](https://github.com/olets/zsh-abbr) from `4facba3` to `899f477`.
- [Release notes](https://github.com/olets/zsh-abbr/releases)
- [Commits](olets/zsh-abbr@4facba3...889f477)

---
updated-dependencies:
- dependency-name: custom/plugins/zsh-abbr
  dependency-version: 889f4772c12b9dbe4965bbd56f2572af0a28fa3b
  dependency-type: direct:production
...

Signed-off-by: Lucas Larson <LucasLarson@riseup.net>

Author: LucasLarson